Sediment grain size determines microplastic exposure landscapes for sandy beach macroinfauna
نویسندگان
چکیده
Despite the global occurrence of microplastic contamination on sandy beaches, evidence distribution within beaches remains contradictory. When conflicting is used to inform sampling surveys, it increases uncertainty in resulting data. Moreover, hampers spatially explicit risk characterization pollution intertidal fauna. We aimed guide designs for monitoring and quantify macroinfauna exposure microplastics. Microplastic abundance, quantified between 5 mm–66 ?m, lacked a significant zonation across top sediment layer sub-terrestrial, upper lower midlittoral, swash zones at two sites with varying anthropogenic influence microtidal dissipative beach Uruguay. abundance decreased exponentially increasing grain size, as revealed by Bayesian Poisson regression, although decrease was less steep compared prior knowledge regarding – plastic interactions obtained large (millimeter-sized) industrial pellets. Significant differences likely related their proximity freshwater canal. Corresponding field measurements body burdens fibers irregular particles were significantly polychaete Euzonus (Thoracophelia) furcifera, despite its preference finer sediments higher loads, isopods Excirolana braziliensis armata. Results provide critical insights toward representative microplastics sites. Specifically, we caution against limited drift line, instead recommend: 1) reporting morphodynamic characteristics; 2) using clearly defined, ecologically-informed schemes; 3) accounting size covariate normalize among reported levels. The results contribute valuable baseline data realistic landscapes relative preferences macroinfauna, needed laboratory experiments.
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ژورنال
عنوان ژورنال: Environmental Pollution
سال: 2021
ISSN: ['1873-6424', '0269-7491']
DOI: https://doi.org/10.1016/j.envpol.2021.117308